#include<iostream>
#include<string.h>
using namespace std;
int main()
{
    string s1(6,'a');
    string s2 = "qaz";
    string s3 = "wxx";
    string s4 = s2 + s3;
    cout<<"s1为"<<s1<<endl;
    cout<<"s4为"<<s4<<endl;

}